JPS62264826A - Wire electric discharge machine - Google Patents

Abstract

PURPOSE:To prevent a short from occurring in a way for discharging sebris or swarf without fail, dipping it in a dielectric fluid and getting rid of atmospheric dischange, and keep off any wire disconnecting phenomenon in a wire electrode, by performing electric discharge machining is making the wire electrode traveling in a horizontal direction and the work set up on a table both exercise their relative motions. CONSTITUTION:A work 2 is clamped onto a table 3, while a wire electrode 5 is set to an arm 4 and both wire heads 1 and 11. When the work 2 is machined into a pectinate form by way of example, a pectinate groove part 27 is directed downward, and the wire electrode 5 is set so as to travel. And, the wire electrode is traveled, and with a command out of a numerically controlled lathe, the arm 4 and the table 3 are operated so as to exercise their relative motions with each other by a servomechanism, whereby the wire electrode 5 machines the work 2 into the pectinate form. Therefore, debris or swarf is surely dischargeable with the dielectric fluid, and the debris comes to a medium, preventing a short from occurring, and the work is constituted so as to be dipped in the dielectrid fluid, whereby no aerial discharge can be produced there, thus a wire disconnecting phenomenon in the wire electrode is preventable.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention uses a thin wire as an electrode, runs the wire under tension, and generates an electrical discharge between a workpiece, that is, a workpiece and the wire. The present invention relates to a wire electric discharge machine that processes a workpiece into a two-dimensional contour shape in a jig saw style using electric discharge energy.

[Prior Art] Conventionally, the current state of wire electric discharge machines is to machine a workpiece using a portion in which a wire electrode runs in a vertical direction, in other words, in an up-down direction. The wire electrode is guided by rollers fixed to the main body of the wire electric discharge machine and is supplied to a wire head having a wire guide.

On the other hand, the table on which the workpiece is attached moves in the X direction and Y direction according to the machining status of the workpiece upon a command from the NO device, and machining progresses between the table and the wire electrode supplied to the wire head. During machining, servo movement, ie, servo function, is repeated.

In other words, the wire head not only moves relatively in the machining direction during wire electrical discharge machining, but also when electrical discharge machining becomes unstable due to conditions such as machining debris, the wire head moves along the machining trajectory for an instant to eliminate short circuits. It also retreats along. Next, the machine moves forward again and electrical discharge machining is performed. And N C”A TL
The workpiece moves in the horizontal direction, that is, the X direction and the Y direction, and the movements of both are combined, and the workpiece is electrically discharge-machined into a predetermined machining shape by the relative movement vJ of the two. Furthermore, the machining fluid is ejected from nozzles installed vertically with respect to the workpiece. Some are hybrids of both. Furthermore, if the workpiece is plate-shaped, multiple pieces of the workpiece, for example, several to several dozen pieces, may be stacked or folded together, and in some cases, one end of the workpiece may be welded and fixed together, and the other end of the workpiece may be welded and fixed together. Currently, these plate-shaped workpieces are electrical discharge machined by fixing the parts with clamps or the like and running a wire electrode from above to below or vice versa.

[Problems to be solved by the invention] However, unlike the conventional method, the workpiece is machined using the part where the wire electrode runs vertically, and the machining liquid is ejected from the vertical nozzle. Regarding wire electric discharge machines, when the workpieces are stacked workpieces, hollow workpieces, etc., when machining those workpieces, the machining chips cut off by wire electric discharge machining are not discharged. For example, some workpieces are placed on top of another workpiece located below. At this time, these machining debris get caught in the workpiece below, causing a short circuit between the workpiece and the wire electrode, causing the wire, which is the wire electrode, to break, posing a problem. In addition, for those in which the machining fluid is spouted from the upper and lower nozzles, if there is a gap in the middle of the work, the machining fluid will not evenly spray onto the work and the wire electrode, for example, the work located in the middle. There was a problem in that medium discharge occurred and the wire of the wire electrode also caused a 1 gI line. In particular, when the above-mentioned workpieces are piled up in the form of plates, gaps occur between the workpieces, and the machining fluid is not applied uniformly.As a result, machining waste is not drained away and is deposited in that location. These machining debris often cause a short circuit between the workpiece and the wire electrode, resulting in the wire, which is the wire electrode, often breaking.

The purpose of the present invention is to solve the above-mentioned problems, and when processing workpieces, especially stacked plate-like workpieces, into a comb shape, it is possible to smoothly and immediately remove processing waste, and to remove each workpiece in a comb shape. Supply machining fluid uniformly and reliably to the workpiece,
Wire discharge that does not cause the wire of the wire electrode to break due to cut machining waste, etc. as a medium, and does not cause the wire to break due to air discharge due to poor application of machining fluid. The idea is to provide processing machines.

c. Means for Solving the Problems] In order to solve the above problems and achieve the above objects, the present invention is configured as follows.

That is, in the present invention, at least a portion of the wire electrode is set to be able to run in a horizontal direction, and the wire electrode that is running in the horizontal direction and a workpiece fixed on a table are configured to perform relative movement, Regarding the wire electrical discharge machine characterized in that the workpiece is subjected to electrical discharge machining, more specifically, it has a structure that allows the workpiece to be immersed in machining fluid, and the wire electrode is attached to an arm that moves in the vertical direction. The table is movable in a direction perpendicular to the direction of travel of the wire electrode, or the table is movable in a direction perpendicular to the direction of travel of the wire electrode and in a vertical direction. Alternatively, the arm is configured to be able to move in a direction perpendicular to the running direction of the wire electrode, and the relative movement between the arm and the table is controlled by a servo function. The present invention relates to a wire electrical discharge machine characterized by the following:

[Effect]

The wire electrical discharge machine according to the present invention is constructed as described above and operates as follows. That is, at least a portion of the wire electrode is set to be able to run in a horizontal direction, and the wire electrode running in the horizontal direction and a workpiece placed on a table perform relative movement, so that the workpiece is discharged by the wire electrode. Since the workpiece is clean from the machining fluid, the machining debris can be reliably, fluently and immediately discharged by the machining fluid below the workpiece; In this case, the cutting debris and the like are surely dropped downward together with the machining liquid and are discharged, and there is almost no phenomenon in which the wire of the wire electrode is disconnected due to the cut machining waste serving as a medium. In addition, since the workpiece can be immersed in the machining fluid, there is no possibility that the machining fluid is not properly applied to the workpiece and air discharge occurs. The wire of the wire electrode will not break due to the liquid.

〔Example〕

Hereinafter, embodiments of a wire electrical discharge machine according to the present invention will be described in detail with reference to the drawings.

In FIG. 1, the main parts of a wire electrical discharge machine according to the present invention are generally designated by the reference numeral 10. This wire electric discharge machine 10 mainly consists of a machining tank 16 that can contain a machining fluid 6, a table 3 that fixes the workpiece 2 in a removable manner, and an arm 4 that hangs and installs the wire that will become the wire electrode 5. Become. The arm 4 has a bifurcated portion 14.14 at its lower end, and is configured to be able to reciprocate in the vertical direction, that is, in the Z direction.

A wire head 1 is attached to the distal end of each forked portion 14.14.
, 11 are attached respectively. Wire head 1.
A power supply brush 12, a direction changing roller 15, and a wire guide 13 are attached to the power supply brush 11. Further, the arm 4 is provided with a guide roller 7 as appropriate. Further, the forked portion 14, which is the tip of the arm 4, has a structure that has a size that allows it to enter the processing tank 16. Processing tank 16
It is configured so that machining fluid 6 can be put inside.
Furthermore, a table 3 is fixedly or movably mounted and accommodated. The workpiece 2 is configured to be installed on the table 3 in a manner that it can be attached or removed, and the table 3 is provided with appropriate fixing means (not shown) for this purpose. Table 3 and processing tank 1
6 is configured to be movable in a direction perpendicular to the horizontal direction in which the wire electrode 5 runs, that is, in the X direction, that is, in the Y direction. Further, the arm 4 on which the wire electrode 5 is installed is configured to be movable in the vertical direction, that is, in the Z direction. These table 3, processing tank 16, and arm 4 are configured to be able to be servo moved by commands from an NC device (not shown).

In FIG. 2, a wire electrical discharge machine 10 according to the present invention is shown.
A side view of is shown. The table 3 and processing tank 16 are mounted on a slide base 17. The slide base 17 is configured to be movable in a direction perpendicular to the running direction of the wire electrode 5, that is, the horizontal direction, that is, in the Y direction, by a Y-axis drive motor 9 attached to the wire electric discharge machine main body 18. . Further, the arm 4 on which the wire electrode 5 is installed is configured to be movable in the vertical direction, that is, in the Z direction, by a Z-axis drive motor 8 attached to the wire electric discharge machine main body 18.

In FIG. 3, a wire electrical discharge machine 10 according to the present invention is shown.
A front view of is shown. The wire electrode 5 is guided from the source bobbin 22 to guide rollers 19, 20, 21,
The wire is then fed from the guide roller 7 to one of the wire heads 1. The wire electrode 5 runs in the horizontal direction, that is, in the X direction, from one wire head 1 to the other wire end 11. The wire electrode 5 then passes from the wire end 11 to the guide rollers 23, 24, 25 and is stored in a used wire electrode storage box.

Although not shown, it goes without saying that the structure is such that a certain tension or tensile force is applied to the wire electrode 5 in response to the movement of the arm 4 in the X direction. For example, between an arm that moves up and down and a wire electric discharge machine that is in a fixed state, a swinging means that can swing in response to the movement of the arm may be interposed, or it may be possible to extend and contract in response to the movement of the arm. The tension of the wire electrode may be maintained constant by interposing an accumulator means whose length can be changed.

The wire electrical discharge machining atO according to the present invention is constructed as described above and operates as follows.

A workpiece 2 is fixed on a table 3, and a wire electrode 5 is set on an arm 4 and wire heads 1 and 11.

For example, when processing the work 2 into a comb shape, the comb-shaped groove 27 of the work 2 is directed downward, and the wire electrode 5 is set to run there. The wire electrode 5 is made to travel, and then, in response to a command from the NC lathe, the arm 4 and the table 3 are operated to move relative to each other by a servo function. Thereby, the wire electrode 5 can perform electrical discharge machining on the workpiece 2 into a comb shape.

Although the embodiments of the wire electrical discharge machine according to the present invention have been described in detail above, it goes without saying that the present invention is not limited to the detailed structure described above. For example, in the drawings, the workpiece is fixedly mounted only on one side of the table, but the workpiece may be mounted so as to straddle the wire electrode and fix both ends of the workpiece. In addition, although the forked parts of the arm are configured to be fixed and the distance between them is configured to remain unchanged, the arm is constructed so that the distance between the forked parts of the arm is variable depending on the workpiece. may be configured. Furthermore, although one embodiment has been described in detail regarding the movement direction of the table and the arm, the invention is not necessarily limited to such relative movement. For example, the arm may be fixed and the table may move in the vertical direction and the wire electrode. (Alternatively, the arm may be configured to be movable in a direction perpendicular to the horizontal direction in which the wire electrode runs.) Of course, in the drawing, the table and processing tank are configured to move together, but the processing tank may be fixed and the table may be moved. Of course, the machining fluid does not necessarily have to be pure, and depending on the workpiece, the machining fluid may be sprayed from above and below the workpiece.In other words, the wire electrode may be installed to run horizontally. It is sufficient that the wire electrode is configured to apply a predetermined tension in the feeding direction, and that the workpiece and the wire electrode are configured to perform relative movement. Various design changes may be made without departing from the spirit of the technical idea defined by the claims.

〔Effect of the invention〕

The wire electric discharge machine according to the present invention is configured as described above, and has the following effects.

That is, at least a portion of the wire electrode is set to be able to run in a horizontal direction, and the wire electrode running in the horizontal direction and a workpiece placed on a table perform relative movement, so that the workpiece is discharged by the wire electrode. Since the machining process is carried out, the machining waste can be immediately and reliably and smoothly discharged by the machining liquid below the workpiece, and furthermore, the machining waste will inevitably fall downward with the machining liquid due to gravity. and is discharged. Moreover,
The workpiece can be constructed so as to be immersed in the machining liquid, and furthermore, machining debris can be smoothly discharged from the machining liquid. In addition, since the machining scraps are reliably and immediately taken out by the IJr, there is no possibility that the cut machining scraps become a medium and cause a short circuit, and the phenomenon that the wire of the wire electrode is disconnected due to the machining scraps is prevented. Not alive at all. In addition, since the workpiece is clean from the machining fluid, there is no possibility that the machining fluid is not applied properly and an air discharge occurs, and the wire of the wire electrode is not disconnected, etc. It has various effects.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a wire electrical discharge machine according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG.
FIG. 1.11--Wire head, 2--Work, 3--Table, 4--Arm,
5.--1--Wire electrode, 6-m--1 processing 1(;], 7. 12. 19. 20.
21. 23.24.25...-Guide roller, 8...-Z-axis drive motor, 9...--Y
Shaft drive motor, 10---1.-Wire electrical discharge machine,
12---Power supply brush, 13--Wire guide,
14--Two-pronged portion, 15-One-way conversion roller, 16--One processing tank, 17--Slide base, 18--Wire Electrical discharge machine main body, 22...-source bobbin, X---running direction of the wire electrode, Y, Z--... moving direction of the table and/or arm. Figure 2 Figure 3

Claims (7)

[Claims] (1) At least a portion of the wire electrode is configured to be able to travel horizontally, and the wire electrode traveling in the horizontal direction and a workpiece fixed on a table are configured to perform relative movement, and the workpiece is A wire electrical discharge machine characterized by electrical discharge machining. (2) The wire electrical discharge machine according to claim 1, wherein the workpiece can be immersed in machining fluid. (3) The wire electrical discharge machine according to claim 1, wherein the wire electrode runs on a wire head attached to an arm that moves in the vertical direction. (4) The wire electrical discharge machine according to claim 1, wherein the table is movable in a direction perpendicular to the running direction of the wire electrode. (5) The wire electrical discharge machine according to claim 1, wherein the table is movable in a direction perpendicular to the running direction of the wire electrode and in a vertical direction. (6) The wire electric discharge machine according to claim 1, wherein the arm is movable in a direction perpendicular to the running direction of the wire electrode. (7) The wire electric discharge machine according to claim 1, wherein the relative movement between the arm and the table is achieved by a servo function.